LOpenGL Class Reference

OpenGL utility functions. More...

Static Public Member Functions
static char *	openShader (const std::filesystem::path &file)
	Open a GLSL shader file. More...
static const char *	glErrorString (GLenum error)
	Gets a string representation of an OpenGL error code. More...
static GLuint	maxTextureUnits ()
	Maximum number of texture units. More...
static GLuint	compileShader (GLenum type, const char *shaderString)
	Compile a shader. More...
static LTexture *	loadTexture (const std::filesystem::path &file)
	Create a texture from an image file. More...
static bool	hasExtension (const char *extensions, const char *extension)
	Check if a specific OpenGL extension is available. More...

Detailed Description

OpenGL utility functions.

Set of OpenGL ES 2.0 utility functions.

Member Function Documentation

openShader()

char * openShader ( const std::filesystem::path &  file )

static

Open a GLSL shader file.

Note

The returned string must be manually freed when no longer used.

Parameters

file	Path to the shader file.

Returns

A string with the contents of the shader or nullptr in case of error.

glErrorString()

const char * glErrorString ( GLenum  error )

static

Gets a string representation of an OpenGL error code.

This function converts an OpenGL error code obtained from glGetError() into a human-readable string.

Parameters

error

The OpenGL error code returned by glGetError().

Returns

A const char pointer containing the error message.

maxTextureUnits()

GLuint maxTextureUnits ( )

static

Maximum number of texture units.

Returns

An integer with the maximum number of texture units supported by OpenGL.

compileShader()

GLuint compileShader ( GLenum  type, const char *  shaderString  )

static

Compile a shader.

Parameters

type	Type of shader (GL_VERTEX_SHADER or GL_FRAGMENT_SHADER).
shaderString	String with the shader source code.

Returns

The shader ID or 0 if an error occurs.

loadTexture()

LTexture * loadTexture ( const std::filesystem::path &  file )

static

Create a texture from an image file.

Loads and creates a texture from an image file.

Note

The image format is always converted to DRM_FORMAT_ARGB8888 or DRM_FORMAT_ABGR8888.

Parameters

file	Path to the image file. Must be an image format supported by STB Image (JPG, PNG, TGA, BMP, PSD, GIF, HDR, PIC).

Returns

A new texture or nullptr in case of error.

hasExtension()

bool hasExtension ( const char *  extensions, const char *  extension  )

static

Check if a specific OpenGL extension is available.

This function queries the list of supported OpenGL extensions and determines whether the specified extension is among them.

Parameters

extension

The name of the OpenGL extension to check.

Returns

true if the extension is available, false otherwise.